JPH0751690A - Foreign matter adsorbent, carrier of adequate bacteria and their production - Google Patents

Abstract

PURPOSE:To make it possible to efficiently and effectively purify all kinds of foreign matter-contg. liquids contg. foreign matter and to shorten the stagnation time thereof by forming a carrier out of a foam having closed cells and having the apparent sp. gr. or true sp. gr. below the sp. gr. of the mother liquor. CONSTITUTION:A vessel 1 having its upper part opened is internally provided with a blocking plate 13. The carriers 2a which carry microorganisms, have closed cells and the apparent sp. gr. or true sp. gr. below the sp. gr. of the mother liquor in which the required foreign matter exists is packed in the lower part of the plate to form a suspended bed 2. The foreign matter-contg. liquid is filtered by an anaerobic granulated mud tank 10 when the foreign matter-contg. liquid is poured from a water spraying nozzle 4 via an introducing pipe 3 upward from the lower part in the vessel 1. Thereafter, this liquid passes a sludge granule zone 11 and is double filtered by the respective carrier zones 2 of a suspended bed 2 and the microorganisms carried therein. The microorganism-decomposition of the org. matter and nitrification are executed during this time. The foreign matter is gathered by a water collecting pipe 5 from the water surface and is discharged from a drain pipe 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a foreign matter adsorbent suitable for use in collecting or removing foreign matter contained in any foreign matter-containing liquid that requires treatment, such as the ocean, rivers, lakes and marshes, factory wastewater, and the like. The present invention relates to a carrier for suitable bacteria for decomposing foreign substances and a method for producing them.

[0002]

2. Description of the Related Art Conventionally, for example, eutrophication of oceans, rivers, lakes and marshes or industrial wastewater has caused various abnormalities such as red tides and water-blooms.
It was used in combination with sand and anthracite filtration.

[0003] These algae have a fine particle diameter of 2 to 5 microns as typified by water-bloom, and usually form a group and have a large block, but when pumped up, they return to individual particles, and sand or anthra. Filtration is difficult at the site. Therefore, algae must be killed by increasing the amount of chlorine, and as a result, highly carcinogenic trihalomethane is produced. In addition, in eutrophic oceans, lakes and rivers, BOD, C
The removal of index factor substances such as OD and SS can be achieved to some extent by coagulation sedimentation and combined use of activated carbon and sand filtration, but it is difficult to treat a large amount of water at high speed with high performance at low cost.

Therefore, as the anaerobic treatment, there are a method of raising the temperature to promote fermentation, a method of using an upward flow (sludge granate method: VASB method) and the like.

Of the above methods, the method of raising the temperature by anaerobic treatment to ferment is effective for the treatment of waste with a large amount of solids such as sewage sludge and hazardous waste. In such cases, running cost is not a good idea. In addition, the VASB method is effective as a method for increasing the contact efficiency by utilizing the self-granulation of bacteria, but there is no SS concentrating structure (sludge granulation part) to further improve the efficiency, and the performance of the biofilm filtration on the upper side. Since there is no addition of water, a long residence time is required and there is a drawback that the equipment becomes excessive.

[0006]

In view of the above problems of the prior art, the main object of the present invention is to efficiently and effectively treat any mother liquor that requires treatment, such as the ocean, rivers, lakes, and factory wastewater. (EN) Provided are a foreign matter adsorbent that can be purified, a carrier for suitable bacteria, or a valuable material recovery material for recovering non-ferrous metals and the like after metal ion exchange in the product manufacturing process, and a manufacturing method thereof.

[0007]

According to the present invention, the above-mentioned object is to adsorb foreign matter contained in the mother liquor by adsorbing the foreign matter contained in the mother liquor by contacting with the mother liquor containing the foreign matter requiring recovery or removal. A carrier for supporting suitable bacteria for decomposing foreign matter, comprising a foam having an apparent specific gravity or true specific gravity having independent bubbles due to independent foaming, which is equal to or lower than the specific gravity of the mother liquor. And by providing a support for suitable bacteria.
It is advisable to manufacture these so that the raw material resin material is kneaded to be independently foamed to form closed cells inside.

[0008]

By doing so, for example, the adsorbent can be adsorbed on the foam and removed by floating the adsorbent in the upper part of the container and flowing the liquid containing the foreign substance from the lowermost part to the upper part. In addition, it is easy to self-granulate the microorganisms by suspending the carrier carrying the microorganisms (appropriate bacteria) in the upper part of the container and flowing the foreign substance-containing liquid from the lowermost part to the upper part. Nonetheless, since the carrier is floating, a concentration zone of SS is formed between the lowermost part and the upper microbial layer (floating layer) of the foreign matter-containing liquid, which can promote the granulation and sedimentation of the excess sludge. Further, since the adsorbent obtained by crushing the foam or each carrier is a porous polyhedron, since the surface area is large, the contact area with the liquid containing the foreign matter in the floating layer can be improved, and the carrier In this case, the growth of nitrifying bacteria (appropriate bacteria) is promoted, that is, the decomposition and nitrification of organic substances are promoted, and the ability to purify the liquid containing foreign matter can be enhanced. Further, unlike the conventional method, it is not necessary to perform pressure floating as a pretreatment or coagulation-sedimentation treatment, and it is possible to treat the liquid containing a high-concentration foreign matter as it is. Can be reduced.

If each bubble of the adsorbent or the carrier is an open cell, water may be formed in the adsorbent or the carrier, and in the case of the adsorbent, the adsorbed foreign matter may flow into the mother liquor again. , In the case of a carrier, it is considered that suitable bacteria are supported for a long period of time and it is difficult to grow, but in the adsorbent or the carrier of the present invention, each bubble is not continuous, and water is formed in the adsorbent and the carrier. Not done. Therefore, in the case of the adsorbent, the adsorbed foreign matter does not flow into the mother liquor again, and in the case of the carrier, it becomes easy to carry and proliferate suitable bacteria in a remarkable manner. Further, regarding the efficiency of collecting or removing foreign matter, the surface area of the foam having the closed cells by the independent foaming may be smaller than that of the foam having the open cells by the continuous foaming. Since water is formed inside the foam, it is difficult for that part to be adsorbed and contact with suitable bacteria. Therefore, the surface area (contact area with the mother liquor) effective for adsorbing foreign matters or contacting the suitable bacteria carried on the carrier is larger for the foam having closed cells (the adsorbent of the present invention or the carrier). The size is larger than that of a foam having open cells. Further, since the adsorbent or the carrier of the suitable bacteria is composed of a large number of small pieces having irregular sizes and shapes formed by crushing the foam, the contact efficiency with the mother liquor is improved.

The adsorbent or carrier made of a foam having such closed cells can be obtained by kneading a resin material as a raw material and foaming at a low pressure.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram showing a treatment apparatus using anaerobic bacteria showing a first embodiment to which the present invention is applied. In the figure, a container 1 having an open upper portion is provided with a deterrent plate 13, and an apparent specific gravity or true specific gravity carrying microbes (appropriate bacteria) is below the mother liquor specific gravity in which foreign substances need to be removed. The carrier 2a (floating filler) is filled to form the floating layer 2. Further, a sprinkling nozzle 4 is provided below the container 1 via an introduction pipe 3 in order to flow the mother liquor requiring treatment such as the ocean, rivers, lakes and marshes, and factory wastewater into the container 1. A water collecting pipe 5 is provided above the floating layer 2 in the container 1, and the treated water is collected by the water collecting pipe 5 and discharged from the drain pipe 6. In addition, a surplus sludge draining pipe 7 having a discharge valve 7a is provided at the bottom of the container 1, and a backwash nozzle 8 is provided in the middle layer of the container 1.

Here, the carrier 2a is made by adding 6% of a foaming agent to a synthetic resin of 86% of crystalline polypropylene and 8% of amorphous polypropylene by weight% so that the diameter of bubbles is 10 μm to 10 m.
It is composed of small pieces of polyhedron having a diameter of 0.1 mm to 300 mm obtained by independently foaming so as to have m and crushing the foam, and floating by suspending a large number of carriers 2a of various sizes. It is layer 2. still,
The carrier 2a also serves as an adsorbent that adsorbs foreign matter.

In this embodiment, as shown in the figure, the container 1 is provided with a lid in consideration of deodorization and recovery of waste gas such as methane gas, and a gas recovery pipe 9 is provided at the top thereof. The gas recovery pipe 9 is provided with a U vent in which water is collected. still,
In practice, the upper part of the container 1 may be left open.

An anaerobic granulation sludge layer 10 composed of excess sludge and microbial mass is formed below the water spray nozzle 4 in the container 1, and a sludge granulation zone 11 is formed between the water spray nozzle 4 and the floating layer 2.
Will be formed. Reference numeral 19 is an adsorbent or a carrier classifying plate for preventing the carrier 2a from flowing out to the lower part.

When raw water (liquid containing foreign matter) is poured from the lower part of the container 1 upward through the sprinkling nozzle 4 through the introduction pipe 3, the anaerobic granulated sludge layer 1 composed of excess sludge and microbial aggregates.
0, passes through the sludge granulation zone 11 to reach the floating layer 2, passes through the floating layer 2, is collected by the water collecting pipe 5 from the water surface, and is discharged from the drainage pipe 6. Here, coarsening due to collision of SSs is promoted while passing through the sludge granulation zone 11 stagnant portion, and anaerobic granulation sludge layer 10 is formed by self-granulation by microorganisms, and foreign matter-containing liquid Is anaerobic granulation sludge layer 10
After being filtered by the above, it is double filtered by each carrier (adsorbent) 2a of the floating layer 2 passing through the sludge granulation zone 11 and the microorganisms loaded therein, and during that time, microbial decomposition and nitrification of organic substances And are done.

Next, a procedure for manufacturing the carrier 2a will be described. FIG. 2 is a cross-sectional view of an extrusion kneader 81 with a gas vent opening for molding the foam of the carrier 2a. The extrusion kneader 81 with a gas vent opening has a cylinder 82, a screw 83 provided inside the cylinder 82, and a hopper 84 provided at the base end of the cylinder 82 for charging raw materials. A vent 82a, to which an openable / closable lid 85 is attached, is provided at an intermediate portion of the cylinder 82. Further, a heater 86 is provided at an appropriate position on the outer periphery of the cylinder 82
Is provided so that the cylinder 82 can be heated to a desired temperature at which the raw material can foam in the cylinder 82. Here, the tip end side of the cylinder 82 is simply opened, and no die or the like is provided. Therefore, when the raw material is put into the extrusion kneader 81 with the gas vent opening,
The product will be extruded from the opening 82b of the cylinder 82 at a relatively low pressure. A pool 87 in which cooling water is stored is provided below the opening 82b to cool the product extruded from the opening 82b.

As described above, a raw material obtained by adding 6% of a foaming agent to a synthetic resin of 86% crystalline polypropylene and 8% amorphous polypropylene by weight% is charged from the hopper 84 into the extrusion kneader 81 with a gas vent opening. Then, at low pressure, it flows in the cylinder 82 while being kneaded by the screw 83. At this time, the raw material is heated by the heater 86, and the pressure is adjusted to foam the bubbles to have a diameter of 10 μm to 10 mm. Since this foaming is performed while kneading at a low pressure, it becomes independent foaming, and the bubbles in the raw material become independent bubbles.

In this way, the independently foamed product has an opening 82b.
And is cooled in the pool 87. Then, it is crushed by a well-known crusher (not shown), and 0.1m
An adsorbent consisting of small pieces of polyhedron with a diameter of m to 300 mm is completed. In order to use this as a carrier for suitable bacteria, the suitable bacteria may be supported by immersing it in a solution containing the suitable bacteria.

In this embodiment, a synthetic resin of 86% crystalline polypropylene and 8% amorphous polypropylene to which 6% of a foaming agent is added is used as a raw material, but polyethylene and amorphous polyethylene are used as the resin. It may be used, or may be used as a foam by using a resin material most suitable for the content component of the waste water in which foreign substances that need to be removed are present and foaming. Further, natural porous materials such as sawdust, sawdust, grain chaff, wood chips, fiber pieces, and non-woven cloth pieces may be mixed in a desired ratio. In this case, it is possible to secure a certain amount of bubbles, and it can be expected to reduce the cost by using waste. Further, in the present embodiment, the independent foaming was performed in the extrusion kneader with the gas vent opening, but the same foam can be obtained by charging the raw materials into a normal container and kneading while heating.

FIG. 3 is a diagram schematically showing a treatment apparatus using anaerobic bacteria showing a second embodiment to which the present invention is applied. The main body of the anaerobic bacterium treatment equipment in this implementation is the first
However, the drainage pipe 6 is connected to the lower water spray nozzle 24 in the denitrification tank 21 at the latter stage. Also,
An injection pipe 6a is connected to an intermediate portion of the drain pipe 6 so that a microbial growth nutrient is injected into the treated water in the drain pipe 6. Like the floating layer 2, the denitrification tank 21 has a denitrification layer 22 formed by suspending a large number of carriers 22a whose apparent specific gravity or true specific gravity supporting microorganisms (appropriate bacteria) is equal to or less than the mother liquor specific gravity which needs to be removed. It is provided. Denitrification layer 2 of denitrification tank 21
A water collecting pipe 25 and a drain pipe 26 connected to the water collecting pipe 25 are provided on the upper portion of the water collecting pipe 2. The denitrification tank 21 discharges nitrogen gas from the upper end thereof.

The drain pipe 26 is connected to the lower water spray nozzle 34 in the aerobic tank 31 at the subsequent stage. In the aerobic tank 31, as in the floating layer 2, a large number of carriers 32a having an apparent specific gravity or a true specific gravity for supporting microorganisms (appropriate bacteria) and a foreign matter that needs to be removed and is equal to or lower than the mother liquor specific gravity are suspended. The aerobic layer 32 is provided. A water collecting pipe 35 and a drain pipe 36 connected to the water collecting pipe 35 are provided above the aerobic layer 32 of the aerobic tank 31.

According to this embodiment, the nitrogen in the liquid containing nitrified foreign matter which has been treated with anaerobic bacteria in the container 1 is denitrified,
It is dephosphorized and discharged to the outside. The other configuration is the same as that of the first embodiment.

FIG. 4 is a diagram schematically showing a treatment apparatus using anaerobic bacteria showing a third embodiment to which the present invention is applied. The configuration of this embodiment is almost the same as that of the second embodiment,
The return pipe 40 is connected to the drain pipe 36 from the aerobic tank 31,
A part of the treated water is circulated through the introduction pipe 3. As a result, the BOD (index factor substance) of raw water is utilized to grow microorganisms and accelerate denitrification. The other structure is similar to that of the second embodiment.

Although the adsorbent of the present invention and the carrier are filled in the container in each of the above-mentioned embodiments, they may be simply suspended in the mother liquor. In this case, the adsorbent that has been adsorbed may be collected after a lapse of a predetermined time in which the foreign matter is sufficiently adsorbed in the bubbles of the adsorbent due to the surface tension and the capillary phenomenon.

FIG. 5 is a diagram schematically showing a waste liquid treatment apparatus showing a fourth embodiment to which the present invention is applied. In this embodiment, the adsorbent and the carrier of the present invention are used in a waste liquid treatment device for separating a floating substance and a liquid substance contained in the bottom (precipitation tank) of the initial receiving tank (precipitation tank) of the ocean, rivers, lakes and marshes. Is.
In the figure, a container 51 has a lower body 51a and a lower body 51a, each of which has a large diameter at the upper portion and a small diameter at the lower portion and has a substantially inverted conical shape.
And a bottomed tubular upper body 51b having an opening that faces the bottom of the above with a slight distance therebetween. A drain valve 51c is provided on the bottom of the lower body where the diameter is reduced. A suppression plate 53 is provided in the upper body 51b, and an adsorption filtration separation material 52a as a floating packing material whose apparent specific gravity or true specific gravity is below the specific gravity of the mother liquor in which foreign substances need to be collected or removed is filled under the suppression plate 53. Then, the floating layer 52 is formed. Introducing pipe 54, which is connected to a water amount adjusting tank 55 and has a U vent 56 and a backflow prevention solenoid valve 57 in the intermediate portion, in order to flow the waste liquid into container 51, in the middle portion of upper body 51b.
Is open. In addition, the lower end opening of the upper body 51b is fully opened to collect a large amount of sludge that is granulated in the floating layer 52 without any hindrance, and the lower body 51a is collected at the reduced bottom of the lower body 51a, and the drain valve 51c is opened. It is designed to be discharged to the outside. In addition, a drain pipe 58 for draining the treated water is opened at the upper end of the upper body 51b. Here, a pump (not shown) is connected to the drain pipe 56 and is adjusted so that the water surface does not overflow from the lower body 51a and the water is constantly filled from the top of the upper body 51b to the drain pipe 58.

To actually treat the waste liquid, the waste liquid is poured into the container 51 through the introduction pipe 54. Then, the floating sediment (foreign matter) and the liquid are separated in the floating layer 52, and the liquid is discharged as clear water from the drain pipe 58, and the floating sediment is coarse-grained and further increased to increase in the lower body 51a. Collected at the shrinking bottom. Then, by opening the drain valve 51c, this is discharged to the outside. Here, as in the case of the first to third embodiments, the adsorptive filtration separation material 52a has a foaming agent of 6% added to a synthetic resin of 86% of crystalline polypropylene and 8% of amorphous polypropylene by weight% so that the diameter of bubbles is 10 μm to 1
It is composed of small pieces of polyhedron having a diameter of 0.1 mm to 300 mm obtained by crushing the foam independently foamed to 0 mm, and floating a large number of adsorption filtration separation materials 52a of various sizes. Thus forming the floating layer 52. The adsorbent of the present invention can also be used in this way.

FIG. 6 schematically shows a fifth embodiment to which the present invention is applied, which is an upflow-type waste liquid treatment apparatus by aseptic filtration capable of performing gas-liquid contact or contact with a suitable bacterium. It is a figure. In the figure, a container 61 is provided with a deterrent plate 63, and a carrier having an apparent specific gravity or a true specific gravity for supporting microbes (appropriate bacteria) below the mother liquor specific gravity in which foreign substances that need to be collected or removed exist. 62a (floating filler) is filled to form the floating layer 62. In the lower part of the container 61, an introduction pipe 6 is provided to inject (aerate) air into the container 61.
4 is opened and an introduction pipe 65 for pouring the waste liquid into the container 61 is provided. Further, a drain pipe 66 for draining the treated water is opened at the upper part of the container 1. In addition, reference numeral 69 is an adsorbent or a classifying plate for a carrier for preventing the carrier 62a from flowing out to the lower part.

To actually treat the waste liquid, the waste liquid is allowed to flow into the container 61 from the introduction pipe 65 while the air is allowed to flow from the introduction pipe 64 into the container 61. Then, the waste liquid and the air are appropriately brought into contact with each other in the floating layer 62, and the waste liquid is purified. here,
As in the first to fourth embodiments, the carrier 62a is 86% by weight of crystalline polypropylene and 8% by weight of amorphous polypropylene.
% Synthetic resin with 6% foaming agent to give a bubble diameter of 10 μm
It is composed of small pieces of polyhedron having a diameter of 0.1 mm to 300 mm obtained by crushing the foam independently by independently foaming so as to have a size of -10 mm. It forms the floating layer 62.

FIG. 7 is a diagram schematically showing a sixth embodiment of the present invention, in which a mother liquor downward flow type waste liquid treatment apparatus having foreign matter having a specific gravity of the mother liquor or less capable of performing gas-liquid contact is used. . In the figure, a container 71 is provided with a restraining plate 73, and a carrier having an apparent specific gravity or true specific gravity for supporting microorganisms (appropriate bacteria) below the mother liquor in which foreign substances that need to be collected or removed exist. 72a (floating filler) is filled to form the floating layer 72. In the lower part of the container 71, an introduction pipe 74 is opened to let air flow into the container 71 (aeration), and a drain pipe 75 for discharging treated water is opened. Further, an inlet pipe 76 for pouring the waste liquid into the container 71 and a discharge pipe 77 for discharging the separated foreign matter to the outside are provided at the upper end of the container 71, and a water layer W is provided above the floating layer 72. A waste liquid dispersion plate 78 having a large number of holes is provided. Incidentally, reference numeral 79 is a carrier 72a.
Is a classifying plate for an adsorbent or a carrier for preventing the particles from flowing out to the lower part, and a symbol O is a layer of separated foreign matter.

To actually treat the waste liquid, the waste liquid is poured into the container 71 through the introduction pipe 76 while the air is introduced through the introduction pipe 74 into the container 71. Then, the waste liquid and the air are appropriately brought into contact with each other in the floating layer 72, and the waste liquid is purified. here,
The carrier 72a is 86% by weight of crystalline polypropylene and 8% by weight of amorphous polypropylene as in the first to fifth embodiments.
% Synthetic resin with 6% foaming agent to give a bubble diameter of 10 μm
It is composed of small pieces of polyhedron having a diameter of 0.1 mm to 300 mm obtained by crushing the foam independently foamed to 10 mm, and by suspending a large number of carriers 72a of various sizes. It forms the floating layer 72. Further, by using the downward flow of FIG. 7 and the upward flow of FIG. 6 together, it is possible to separate the pollutant having a smaller specific gravity of the mother liquor and the pollutant having a larger specific gravity than the mother liquor.

Here, naphtha, kerosene or various solvents are used as an extractant for transferring foreign substances by using the above-mentioned downflow type waste liquid treatment device, and mother liquor containing foreign substances which need to be recovered or removed is injected. If the adsorbent of the present invention is installed in order to prevent downward flow of foreign matter, the desired foreign matter can be selectively collected or removed. For example, it is suitable for collecting radioactive substances that are difficult to recover and solid non-ferrous metal liquids after metal ion exchange and the like and preventing them from being ionized again.

[0033]

As is apparent from the above description, according to the present invention, an adsorbent or a carrier of a suitable bacterium, which is a foam having an apparent specific gravity or a true specific gravity of the closed liquor by the independent foaming, is equal to or less than the specific gravity of the mother liquor. It is possible to efficiently and effectively purify all foreign matter-containing liquids (mother liquor) containing foreign substances such as BOD, COD, SS, etc. that require treatment, such as the ocean, rivers, lakes and marshes, factory wastewater, etc., simply by contacting them with mother liquor. Therefore, the residence time can be shortened. Further, since the adsorbent and the carrier float, for example, when the adsorbent and the carrier are used, the device can be extended not only in the horizontal direction but also in the vertical direction, so that the installation area can be reduced and the device can be reduced. Can be miniaturized. Further, since the adsorbent or the carrier of the suitable bacteria is composed of a large number of small pieces having irregular sizes and shapes formed by crushing the foam, the contact efficiency with the mother liquor is improved. Furthermore, when a natural porous material is mixed in the adsorbent or a support for suitable bacteria, it is possible to secure a certain amount of bubbles and reduce the cost by using waste.

[Brief description of drawings]

FIG. 1 is a diagrammatic view of a treatment apparatus using anaerobic bacteria showing a first embodiment to which the present invention is applied.

FIG. 2 is a cross-sectional view of an extrusion kneader with a gas vent opening showing a procedure for manufacturing an adsorbent or a support for suitable bacteria, which is made of a foam having closed cells according to the present invention.

FIG. 3 is a diagrammatic view of a treatment apparatus using anaerobic bacteria similar to FIG. 1, showing a second embodiment to which the present invention is applied.

FIG. 4 is a diagrammatic view of a treatment apparatus using anaerobic bacteria similar to FIGS. 1 and 3, showing a third embodiment to which the present invention is applied.

FIG. 5 is a diagrammatic view of an upflow high specific capacity sludge removing device showing a fourth embodiment to which the present invention is applied.

FIG. 6 is a diagrammatic view of an upflow treatment apparatus according to a fifth embodiment of the present invention, in which a mother liquor mainly containing foreign matter having a specific gravity of the mother liquor or more is aseptically filtered or contacted with a suitable bacterium.

FIG. 7 is a diagrammatic view of a downward flow treatment device for mother liquor having foreign matter having a specific gravity of mother liquor or less, showing a sixth embodiment to which the present invention is applied.

[Explanation of symbols]

 1 Container 2 Floating Layer 2a Carrier 3 Introducing Pipe 4 Sprinkling Nozzle 5 Water Collection Pipe 6 Drainage Pipe 7 Excess Sludge Drain Pipe 7a Discharge Valve 8 Nozzle 9 Gas Recovery Pipe 10 Anaerobic Granulation Sludge Layer 11 Sludge Granulation Zone 13 Suppression Plate 19 Adsorption Classification plate for material or carrier 21 Denitrification tank 22 Denitrification layer 22a Carrier 24 Water sprinkling nozzle 25 Water collecting pipe 26 Drain pipe 31 Aerobic tank 32a Carrier 32 Aerobic layer 34 Water sprinkling nozzle 35 Water collecting pipe 36 Drain pipe 40 Return pipe 51 Container 51a Lower body 51b Upper body 51c Drain valve 52 Floating layer 52a Adsorption filtration separation material 53 Suppression plate 54 Introducing pipe 55 Water amount adjusting tank 56 U vent 57 Backflow prevention solenoid valve 58 Drain pipe 61 Container 62 Floating layer 62a Carrier 63 Suppression plate 64 introduction pipe 65 introduction pipe 66 drainage pipe 69 adsorbent or carrier classifying plate 71 container 72 floating layer 72a Holding body 73 Suppression plate 74 Inlet pipe 75 Drain pipe 76 Inlet pipe 77 Discharge pipe (recovery pipe) 78 Waste liquid dispersion plate 79 Adsorbent or carrier classifying plate W Water layer O Foreign material layer 81 Extrusion kneading with degassing opening Container 82 Cylinder 82a Vent 82b Opening 83 Screw 84 Hopper 85 Lid 86 Heater 87 Pool

Claims (10)

[Claims] 1. A foreign matter adsorbent that adsorbs foreign matter contained in the mother liquor by bringing it into contact with a mother liquor containing foreign matter that needs to be recovered or removed, and has an apparent specific gravity or true specific gravity having independent bubbles due to independent foaming. Is a foam having a specific gravity of the mother liquor or less. 2. A carrier for supporting a suitable bacterium for decomposing foreign matter contained in a mother liquor in which a foreign matter requiring recovery or removal exists, the apparent specific gravity or true particle having closed cells by independent foaming. A carrier for a suitable bacterium, comprising a foam having a specific gravity not higher than that of the mother liquor. 3. The foreign matter adsorbing material according to claim 1, wherein the foreign matter adsorbing material is composed of a large number of small pieces having irregular sizes and shapes formed by crushing the foam. 4. The carrier of a suitable bacterium according to claim 2, comprising a large number of small pieces having irregular sizes and shapes formed by crushing the foam. 5. The foreign matter adsorbing material according to claim 1, wherein the foam comprises a resin foam mixed with a natural porous material. 6. The natural porous material comprises one or more of sawdust, sawdust, grain chaff, wood chips, fiber pieces and non-woven cloth pieces, and the foam is the natural porous material. The foreign matter adsorbing material according to claim 5, which is formed by foaming a resin material in which a foaming agent is mixed with a quality material. 7. The carrier according to claim 2, wherein the foam comprises a resin foam mixed with a natural porous material. 8. The natural porous material comprises any one or more of sawdust, sawdust, grain chaff, wood pieces, fiber pieces and non-woven piece pieces, and the foam is the natural porous material. The carrier according to claim 7, which is formed by foaming a resin material in which a foaming agent is mixed with a quality material. 9. A method for producing a foreign matter adsorbent for adsorbing a foreign matter contained in the mother liquor by contacting the mother liquor containing the foreign matter requiring recovery or removal, the method being independent while kneading a raw material resin material. A method for producing a foreign matter adsorbent, comprising the step of foaming and forming closed cells inside. 10. A method for producing a carrier for supporting a suitable bacterium for decomposing foreign matter contained in a mother liquor containing foreign matter requiring recovery or removal, which comprises kneading a resin material as a raw material. A method for producing a carrier for a suitable bacterium, which comprises a step of forming independent bubbles and forming closed cells inside.